EP3555571B1 - Système de capteur pour déterminer au moins une propriété de rotation d'au moins un élément rotatif tournant autour d'au moins un axe de rotation - Google Patents

Système de capteur pour déterminer au moins une propriété de rotation d'au moins un élément rotatif tournant autour d'au moins un axe de rotation Download PDF

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EP3555571B1
EP3555571B1 EP17787413.8A EP17787413A EP3555571B1 EP 3555571 B1 EP3555571 B1 EP 3555571B1 EP 17787413 A EP17787413 A EP 17787413A EP 3555571 B1 EP3555571 B1 EP 3555571B1
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Prior art keywords
sensor
sensor system
encoder wheel
coil
encoder
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German (de)
English (en)
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EP3555571A1 (fr
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Fabian Utermoehlen
Dayo Oshinubi
Andre Yashan
Stefan Leidich
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/147—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/2013—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by a movable ferromagnetic element, e.g. a core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • G01D5/2046—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by a movable ferromagnetic element, e.g. a core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • G01D5/2053—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by a movable non-ferromagnetic conductive element
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/09—Magnetoresistive devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/70—Position sensors comprising a moving target with particular shapes, e.g. of soft magnetic targets
    • G01D2205/77—Specific profiles
    • G01D2205/771—Toothed profiles

Definitions

  • a rotational property is generally understood to mean a property which at least partially describes the rotation of the rotating element. This can be, for example, an angular velocity, a rotational speed, an angular acceleration, an angle of rotation or another property which can characterize a continuous or discontinuous, uniform or non-uniform rotation or rotation of the rotating element. Examples of such sensors are in Konrad Reif (Ed.): Sensors in Motor Vehicles, 2nd Edition, 2012, pages 63-74 and 120-129 described.
  • a position of a camshaft of an internal combustion engine relative to a crankshaft can be determined with a so-called phase sensor by means of a Hall sensor.
  • a Hall sensor typically an encoder wheel is attached to the rotating axle.
  • a method for determining a phase position of an adjustable camshaft of an internal combustion engine, which comprises a sensor wheel and a camshaft adjuster is described.
  • the phase position of the camshaft is determined on the basis of phase edge interrupts triggered by the encoder wheel and a model that is dependent on at least one operating parameter of the camshaft adjuster.
  • an inductive linear and rotary position sensor is described.
  • a device with an excitation coil and a receiver coil is described.
  • the excitation coil is excited by an excitation source and generates a magnetic flux.
  • the receiver coil generates a received signal through an inductive coupling between the excitation coil and the receiver coil
  • the pamphlet DE 10 2012 200195 A1 discloses another similar sensor system.
  • Such sensor devices can have a complex structure. In particular, simple installation and removal of the sensor devices is not possible.
  • a sensor system for determining at least one rotational property of a rotating element is therefore proposed.
  • a “sensor system” is generally understood to mean any device which is suitable for detecting the at least one rotational property and which, for example, can generate at least one electrical measurement signal corresponding to the detected property, such as a voltage or a current. Combinations of properties can also be recorded.
  • a “rotational property” is basically understood to mean a property which at least partially describes the rotation of the rotating element. This can be, for example, an angular velocity, a rotational speed, an angular acceleration, an angular position or another property which can at least partially characterize a continuous or discontinuous, uniform or non-uniform rotation or rotation of the rotating element.
  • the rotational property can be a position, in particular an angular position, or a speed or a combination of both variables. Other properties and / or other combinations of properties can also be detectable.
  • an “angular position” is basically understood to mean an angle of rotation of a rotatable device, for example the rotating element or the encoder wheel, with respect to an axis perpendicular to the rotation axis.
  • the sensor system can in particular be set up for use in a motor vehicle.
  • a “rotating element” is basically understood to mean any element which has an axis of rotation and rotates around it.
  • the rotating element can be a shaft in a drive machine, for example a camshaft.
  • an angular position of a camshaft or a speed of a camshaft or a combination of both variables can be determined.
  • the sensor system for determining at least one rotational property of an element rotating about at least one axis of rotation has at least one encoder wheel that can be connected to the rotating element.
  • the encoder wheel has a encoder wheel profile.
  • the sensor system has at least one inductive position sensor.
  • the inductive position sensor has at least one coil arrangement which comprises at least one excitation coil and at least one receiver coil.
  • the sensor system also has at least one phase encoder.
  • the phase generator has at least one magnetic field generator and at least one magnetic sensor element.
  • a “transmitter wheel” is understood to mean any component that can be connected to the rotating element and is set up to produce at least one measurable signal per revolution of the rotating element, in particular a magnetic field change, when connected to the rotating element.
  • a “transmitter wheel profile” is understood to mean, in principle, the entirety of profile elements and spaces of the transmitter wheel arranged between the profile elements.
  • a “profile element” of the encoder wheel is basically understood to mean any shape of the contour of the encoder wheel, in particular a bulge, for example a pin-shaped, tooth-shaped or spiked bulge, or a notch or recess, for example a hole.
  • an "inductive position sensor” is basically any sensor that can generate a measurement signal in accordance with a detected property, in particular an electrical measurement signal, for example a voltage or a current, with the measurement signal being generated based on a change in a magnetic River is based.
  • the detected property can include a position, for example an angular position.
  • the inductive position sensor can be an inductive magnetic sensor.
  • other configurations are also possible in principle.
  • a “coil arrangement” is generally understood to mean any device which comprises at least one coil.
  • a “coil” is basically understood to mean any desired component which has an inductance and is suitable for generating a magnetic field when a current flows.
  • an “excitation coil” is basically understood to mean a coil which generates a magnetic flux when an electrical voltage and / or an electrical current is applied.
  • a “receiver coil” is basically understood to mean a coil which is set up to generate a signal based on an inductive coupling between the excitation coil and the receiver coil, which signal is dependent on the inductive coupling.
  • a “phase transmitter” is basically any sensor that is suitable for determining the speed and / or the angular position of a rotating element connected to a signal transmitter at least once per revolution.
  • a “signal transmitter” is basically any device located on the rotating element or connected or connectable to the rotating element, which is suitable for producing at least one measurable signal per revolution of the rotating element, for example one Magnetic field change.
  • the encoder wheel already described above and detailed below, in particular the at least one profile element of the encoder wheel can function as a signal generator.
  • the rotating element can also have an optical or capacitive signal transmitter.
  • a “magnetic field generator” is basically understood to mean any device which is set up to generate a magnetic field, in particular a temporally constant magnetic field. The generation can be permanent or limited in time.
  • the magnetic field generator can have a permanent magnet and / or an electromagnet, for example a current-carrying coil, in particular a current-carrying coil with an iron core.
  • a “magnetic sensor element” is basically any device which is set up to detect at least one property of a magnetic field and which can, for example, generate at least one electrical measurement signal corresponding to the detected property, such as a voltage or a current. Combinations of properties can also be recorded.
  • the detected property can be a magnetic field strength.
  • the magnetic sensor element has at least one element selected from the group consisting of: a Hall element and a magnetoresistive element.
  • the coil arrangement can be arranged on at least one circuit carrier.
  • the circuit carrier can be essentially coaxial with the axis of rotation be arranged.
  • the circuit carrier can surround the encoder wheel or a circular segment of the encoder wheel in a substantially circular or circular segment shape.
  • the term “essentially circular” is basically understood to mean that the component described has a radius of curvature.
  • the radius of curvature can vary within the component by a value from 0% to 80%, preferably from 0% to 50%, more preferably from 0% to 20% and particularly preferably from 0% to 5%. In particular, the radius of curvature can also be constant.
  • the circuit carrier can also be composed of two or more segments which, for example, can each have a flat or curved design and which can be connected to one another, for example.
  • the segments can then also be arranged overall coaxially to the axis of rotation, even if the individual segments are then arranged tangentially, for example.
  • the sensor system can be set up to detect the inductive coupling and / or a change in the inductive coupling between the excitation coil and the receiver coil.
  • the sensor system can also be set up to detect an electrical measurement signal from the phase encoder.
  • the electrical measurement signal can in particular be a voltage signal.
  • the electrical measurement signal of the phase transmitter can in particular be an electrical measurement signal of the magnetic sensor element, in particular of the Hall element.
  • the sensor system can be set up to detect the inductive coupling brought about by a movement and / or a position of the transmitter wheel and / or the change in the inductive coupling between the excitation coil and the receiver coil.
  • the sensor system can be set up to detect the electrical measurement signal of the phase encoder caused by the position of the encoder wheel.
  • the sensor system can be set up to determine an angular position of the rotating element from the inductive coupling and / or change in the inductive coupling between the excitation coil and the receiver coil caused by the movement and / or the position of the transmitter wheel. Furthermore, the sensor system can be set up to use at least one electrical measurement signal of the phase encoder caused by the position of the encoder wheel to determine the angular position and / or the speed of the rotating element determine. In particular, the sensor system can be set up to determine the angular position and / or the speed of the rotating element with at least two electrical measurement signals of the phase encoder caused by the position of the encoder wheel.
  • the sensor system can be set up to enable the angular position of the rotating element to be available when a voltage supply is switched on.
  • the just described property of availability when the power supply is switched on is also referred to by the English term of the "True Power On” function.
  • the sensor system can in particular have a “true power on” function.
  • the sensor system can be set up to forward the electrical signal of the magnetic sensor element to a control device.
  • the sensor system can have an evaluation unit.
  • the evaluation unit can have at least one evaluation circuit.
  • the evaluation unit can be arranged with the coil arrangement on a common circuit carrier.
  • the evaluation unit can also be arranged separately from the coil arrangement on a further circuit carrier.
  • the excitation coil can have at least one excitation winding.
  • the receiver coil can have at least one receiver turn.
  • a receiver turn can comprise at least two partial turns.
  • the partial turns can be oriented in opposite directions.
  • the receiver coil can consist of one receiver winding, the receiver winding consisting of two partial windings, the partial windings being oriented in opposite directions.
  • the sensor system can have a multiplicity of receiver coils, for example a receiver coil system, in particular a sine / cosine system or a multiphase system. Other coil systems are also fundamentally conceivable.
  • the sensor system can be set up to map a sine system, a cosine system or a multi-phase system for detection.
  • the sensor system can have a number of 1 to 100 receiver coils, preferably 2 to 10 receiver coils, particularly preferably 3 receiver coils.
  • the receiver coils can each consist of at least two partial windings, with the directly successive partial windings being able to be oriented in opposite directions.
  • the receiver coils can have an electrical phase shift with respect to one another.
  • the partial windings of the various receiver coils can be arranged offset from one another according to the electrical phase shift.
  • the magnetic field generator can in particular comprise at least one element selected from the group consisting of a permanent magnet and an electromagnet.
  • the encoder wheel has at least one profile element.
  • the profile element can be selected from the group consisting of: a bulge, in particular a pin-shaped, tooth-shaped or tooth-shaped bulge, for example a tooth; a notch; a recess, for example a hole; a track profiled in the width of the sender wheel.
  • a width of the encoder wheel can be understood to mean the height of a cylinder jacket of the encoder wheel.
  • the transmitter wheel can have a plurality of profile elements.
  • the plurality of profile elements can be arranged distributed over the circumference of the encoder wheel.
  • the profile elements can be arranged equidistantly and / or periodically. Other configurations of the encoder wheel profile are also possible. The profile elements can also not be arranged equidistantly and / or not periodically.
  • the sensor wheel can have at least one material selected from the group consisting of: an electrically conductive material; a ferromagnetic material; a metal.
  • the profile element can have at least one material selected from the group consisting of: an electrically conductive material; a ferromagnetic material; a metal.
  • the sensor system can have at least two encoder wheels. In particular, the encoder wheels can have different encoder wheel profiles.
  • the circuit carrier can surround the encoder wheel and / or a circular segment of the encoder wheel in an essentially circular manner.
  • the coil arrangement in particular the coil arrangement arranged on the circuit carrier, can cover at least one profile element and at least one intermediate space between two profile elements of the encoder wheel in at least one angular position of the encoder wheel.
  • the circuit carrier can be designed to be flexible.
  • the circuit carrier can comprise a flexible material.
  • the circuit carrier can be selected from the group consisting of: a circuit board, in particular a rigid-flex circuit board, for example a bent rigid-flex printed circuit board; a rigid circuit board, in particular a rigid circuit board with notches; a circuit board; a circuit board and a printed circuit, in particular a "printed circuit board” (PCB).
  • PCB printed circuit board
  • the circuit carrier can have at least two flat surfaces.
  • the flat surfaces can be arranged at an angle to one another.
  • the circuit carrier can have at least one connecting element, the connecting element connecting the flat surfaces to one another.
  • the flat surfaces can enclose an angle, the angle being able to have a value from 10 ° to 180 °, preferably from 30 ° to 150 ° and particularly preferably from 60 ° to 120 °.
  • the circuit carrier can be arranged in a housing, in particular in an injection-molded housing.
  • the rotating element has at least one axis of rotation.
  • the at least one encoder wheel can be connected to the rotating element.
  • the encoder wheel can also have an axis of rotation.
  • the rotating element and the encoder wheel can have a common axis of rotation.
  • the encoder wheel can be arranged concentrically around the rotating element.
  • the encoder wheel can have a cylindrical basic shape.
  • the axis of rotation can be an axis of symmetry parallel to a height of the cylinder.
  • the encoder wheel can be connected to the rotating element.
  • the encoder wheel can be fastened on the rotating element, for example by at least one fastening element.
  • the encoder wheel can be mounted concentrically on the rotating element. When the rotating element rotates, the encoder wheel can rotate together with the rotating element.
  • a position, in particular an angular position, of the encoder wheel can correspond to a position, in particular an angular position, of the rotating element.
  • a method for determining a rotational property of an element rotating about at least one axis of rotation comprises the use of at least one sensor wheel that can be connected to the rotating element, the sensor wheel having a sensor wheel profile.
  • the method comprises the following steps, preferably in the order given. A different order is also possible in principle. Furthermore, one or several or all process steps can also be carried out repeatedly. Furthermore, two or more of the method steps can also be carried out completely or partially in a temporally overlapping manner or at the same time. In addition to the method steps mentioned, the method can also comprise further method steps.
  • the method can in particular be carried out using a sensor system according to the present invention, that is to say according to one of the above-mentioned embodiments or according to one of the embodiments described in more detail below. Accordingly, for definitions and optional configurations, reference can largely be made to the description of the sensor element. However, other configurations are also possible in principle.
  • the inductive signal can comprise at least one signal selected from the group consisting of an inductive coupling in the coil arrangement and a change in an inductive coupling in the coil arrangement.
  • the phase encoder signal can include at least one voltage signal of the magnetic sensor element.
  • the inductive coupling and / or the change in the inductive coupling in the coil arrangement can depend on a movement and / or a position of the transmitter wheel.
  • the phase encoder signal can depend on a position of the encoder wheel.
  • the method can include a determination of the angular position of the rotating element with the aid of the detected inductive coupling and / or change in the inductive coupling in the coil arrangement, which is dependent on the position and / or the movement of the sensor wheel.
  • the method can determine the angular position and / or the Include speed of the rotating element with the aid of at least one phase encoder signal caused by the position of the encoder wheel. Furthermore, the method can include the processing of the at least one detected phase encoder signal by an evaluation circuit. Furthermore, the method can include forwarding the at least one recorded phase encoder signal to a control device.
  • an inductive position sensor in particular an absolute angle sensor
  • a phase encoder can be combined with the arrangement according to the invention of the inductive position sensor and the phase sensor. It is possible that the arrangement according to the invention of the inductive position sensor and the phase sensor provides a clear advantage in terms of installation and removal compared to the prior art, in particular when using the sensor system for camshaft position detection. It is thus possible in particular that no additional installation space is required. Furthermore, it is possible that the sensor system, for example the sensor arrangement, in contrast to the prior art, does not have to enclose the entire area of the rotating element, for example the rotating shaft, but can only face it radially in a segment of a circle. It is possible that a sensor system according to the invention is inexpensive.
  • a measuring range of a sensor system can be used by evaluating two or more encoder wheels and / or different encoder wheel profiles, in particular a different number of teeth, to acquire an angular position, in particular to acquire an absolute angle, of an encoder wheel and / or a rotating element, in particular a shaft position, can be expanded to 360 °, for example with the help of the vernier principle (Vernier method).
  • the coil arrangement in particular the coil arrangement arranged on the circuit carrier, can cover at least one profile element and at least one intermediate space between two profile elements of the encoder wheel in at least one angular position of the encoder wheel.
  • an opening angle ⁇ of the coil arrangement can be at least one opening angle ⁇ of a circular segment of the encoder wheel, comprising at least one profile element and at least one space between two profile elements. It is possible that a maximum angular resolution can thereby be mapped.
  • a sensor system can deliver both an angular position of the rotating element, in particular an absolute angle, and, with the aid of the phase encoder, real-time trigger signals, for example for the engine control unit. It is possible that this cannot be guaranteed by using an inductive position sensor alone, in particular an inductive angle sensor, due to the analog and digital signal processing with a corresponding processing time.
  • a sensor system according to the invention can offer greater accuracy compared to the prior art through the combination of the inductive position sensor and the phase encoder. Furthermore, it may be possible that, with the aid of a sensor system according to the invention, requirements for functional safety, in particular also with regard to availability, can be met more easily, in particular since, in the event of failure of the inductive position sensor or the phase encoder, the other sensor, i.e. in particular the phase encoder or the inductive position sensor, signals for motor control, especially with lower accuracy, can deliver. This can, for example, correspond to an emergency run without major losses in performance. Furthermore, it is possible that tracking errors of the inductive position sensor, in particular of the absolute angle sensor, can be compensated for at higher speeds.
  • a sensor system according to the invention can enable the angular position, in particular the absolute angular position, of the rotating element to be available when a voltage supply is switched on.
  • a sensor system according to the invention can have a true power-on function.
  • a true power-on function is provided by the original equipment manufacturer, which is also known as the "Original Equipment Manufacturer” (OEM) is increasingly called for.
  • Figure 1 shows a schematic representation of an embodiment of a sensor system 110 according to the invention in plan view.
  • Figures 2 and 3 each show a schematic representation of an exemplary embodiment of a coil arrangement 112 for use in the sensor system 110 according to FIG Figure 1 .
  • Figure 4 shows a schematic representation of an embodiment of a circuit carrier 114, which is also in the sensor system 110 according to Figure 1 can be used.
  • the Figures 5A, 5B and 6 schematically show exemplary embodiments of a sensor wheel 116 with a sensor wheel profile 118, which are also used in the sensor system 110 according to FIG Figure 1 can be used.
  • the sensor system 110 can in particular be set up for use in a motor vehicle.
  • the sensor system 110 can be set up to detect at least one rotational property of a camshaft.
  • the sensor system 110 can be set up to detect an angular position of the camshaft and / or a speed of the camshaft.
  • the sensor system 110 can in particular include one or more further functional elements not shown in the figures, such as electrodes, electrode leads and contacts, several layers, heating elements or other elements, as shown for example in the above-mentioned prior art.
  • the sensor system 110 for determining at least one rotational property of an element rotating about at least one axis of rotation 120 has at least one encoder wheel 116 that can be connected to the rotating element.
  • the sensor wheel 116 has a sensor wheel profile 118.
  • the sensor system 110 has at least one inductive position sensor 122.
  • the inductive position sensor 122 has at least one coil arrangement 112, which includes at least one excitation coil 124 and at least one receiver coil 126.
  • the sensor system 110 also has at least one phase sensor 128.
  • the phase generator 128 has at least one magnetic field generator 130 and at least one magnetic sensor element 132.
  • Figure 1 shows, inter alia, the phase generator 128 with magnetic field generator 130 and magnetic sensor element 132.
  • the magnetic field generator 130 can comprise at least one element selected from the group consisting of: a permanent magnet; an electromagnet, for example a current-carrying coil, in particular a current-carrying coil with an iron core.
  • the magnetic sensor element 132 has at least one element selected from the group consisting of: a Hall element and a magnetoresistive element.
  • the coil arrangement 112 can be arranged on at least one circuit carrier 114, as in FIG Figures 2 and 3 to see.
  • the circuit carrier 114 can be arranged essentially coaxially to the axis of rotation 120, as in FIG Figure 1 shown.
  • the circuit carrier 114 can surround the encoder wheel 116 or a circular segment of the encoder wheel 116 in an essentially circular manner, as also in FIG Figure 1 to see.
  • the coil arrangement 112 in particular that on the Circuit carrier 114 arranged coil arrangement 112, in at least one angular position of the encoder wheel 116 cover at least one profile element 134 and at least one space 136 between two profile elements 134 of the encoder wheel 116.
  • a in the Figures 1, 2 and 3 shown opening angle ⁇ of the coil arrangement 112 at least one also in Figure 1 shown opening angle ⁇ of the circular segment of the encoder wheel 116, comprising at least one profile element 134 and at least one space 136 between two profile elements 134 correspond. It is possible that a maximum angular resolution can thereby be mapped.
  • the circuit carrier 114 can be designed to be flexible.
  • the circuit carrier can be designed to be flexible and / or curved, in particular circular or circular segment-shaped, as in FIG Figure 4 shown.
  • the circuit carrier 114 can comprise a flexible material.
  • the circuit carrier 114 can be selected from the group consisting of: a circuit board, in particular a rigid-flex circuit board, for example a bent rigid-flex circuit board; a rigid circuit board, in particular a rigid circuit board with notches; a circuit board; a circuit board and a printed circuit, in particular a "printed circuit board" (PCB).
  • the circuit carrier 114 can be arranged in a housing (not shown here), in particular in an injection-molded housing.
  • the Figures 2 and 3 show, inter alia, two different coil arrangements 112 by way of example.
  • the excitation coil 124 can have at least one excitation winding 138.
  • the receiver coil 126 may have at least one receiver turn 140.
  • the receiver turn 140 can comprise at least two partial turns 142.
  • the partial turns 142 can be oriented in opposite directions.
  • the receiver coil 126 can consist of a receiver winding 140, the receiver winding 140 consisting of two partial windings 142, the partial windings 142 being oriented in opposite directions.
  • the sensor system 110 can have a multiplicity of receiver coils 126, for example a receiver coil system, in particular a sine / cosine system or a multi-phase system. Other coil systems are also fundamentally conceivable.
  • the sensor system 110 can be set up as a sine system, a cosine system or a multiphase system for detection map.
  • the sensor system 110 can have a number of 1 to 100 receiver coils 126, preferably 2 to 10 receiver coils 126, particularly preferably 3 receiver coils 126.
  • the receiver coils 126 can each consist of at least two partial windings 142, wherein the directly successive partial windings 142 can each be oriented in opposite directions.
  • the receiver coils 126 can have an electrical phase shift with respect to one another.
  • the respective at least one receiver turn 140 of the receiver coils 126 can be arranged offset from one another according to the electrical phase shift, as in FIG Figure 3 exemplified for a two-phase system comprising a first receiver coil 144 and a second receiver coil 146.
  • the sensor system 110 can have an excitation coil 124 and three receiver coils 126.
  • the receiver coils 126 can each consist of at least two partial windings 142, the directly successive partial windings being oriented in opposite directions.
  • the receiver coils 126 can have an electrical phase shift of 120 ° to one another.
  • the partial windings 142 of the three receiver coils 126 can be arranged offset from one another in accordance with the electrical phase shift.
  • FIGs 5A and 5B show in plan view ( Figure 5A ) and in side view ( Figure 5B ) an exemplary encoder wheel 116 with encoder wheel profile 118.
  • Figure 6 shows in Side view of an alternative embodiment of a sensor wheel profile 118.
  • the sensor wheel 116 has at least one profile element 134. While the profile elements 134 in the embodiment according to Figure 5B extend over an entire width of the encoder wheel 116, the profile elements 134 in the alternative embodiment are shown in FIG Figure 6 Profiled across the width and form a width-profiled track. For example, the profile elements 134, as shown in FIG Figure 6 recognizable, each have a diamond-shaped design. However, other shapes are also conceivable.
  • the at least one profile element 134 can in particular be selected from the group consisting of: a bulge, in particular a pin-shaped, tooth-shaped or jagged bulge, for example a tooth; a notch; a recess, for example a hole; a track profiled in the width of the sender wheel.
  • the sensor wheel 116 can have at least one material selected from the group consisting of: an electrically conductive material; a ferromagnetic material; a metal.
  • the profile element 134 can have at least one material selected from the group consisting of: an electrically conductive material; a ferromagnetic material; a metal.
  • the sensor system 110 can have at least two encoder wheels 116.
  • the encoder wheels 116 can have different encoder wheel profiles 118.
  • the sensor system 110 can be set up to detect the inductive coupling and / or a change in the inductive coupling between the excitation coil 124 and the receiver coil 126.
  • the sensor system 110 can furthermore be set up to acquire an electrical measurement signal from the phase generator 128.
  • the electrical measurement signal can in particular be a voltage signal.
  • the electrical measurement signal of the phase encoder 128 can in particular be an electrical measurement signal of the magnetic sensor element 132, in particular of the Hall element.
  • the sensor system 110 can be set up to detect the inductive coupling brought about by a movement and / or a position of the transmitter wheel 116 and / or the change in the inductive coupling between the excitation coil 124 and the receiver coil 126.
  • the sensor system 110 can be set up to detect the electrical measurement signal of the phase encoder 128 caused by the position of the encoder wheel.
  • the sensor system 110 can be set up to determine an angular position of the rotating element from the inductive coupling and / or change in the inductive coupling between the excitation coil 124 and the receiver coil 126 brought about by the movement and / or the position of the encoder wheel 116.
  • the sensor system 110 can be set up to determine the angular position and / or the rotational speed of the rotating element with the aid of at least one electrical measurement signal of the phase encoder 128 caused by the position of the encoder wheel 116.
  • the sensor system 110 can be set up to determine the angular position and / or the speed of the rotating element with at least two electrical measurement signals from the phase encoder 128 caused by the position of the encoder wheel 116.
  • the sensor system 110 can be set up to forward the electrical measurement signal of the phase generator 128 to a control device (not shown here).
  • the sensor system 110 can have an evaluation unit 148.
  • the evaluation unit can have at least one evaluation circuit.
  • the evaluation unit can be arranged with the coil arrangement 112 on a common circuit carrier 114, as in FIG Figure 4 shown.
  • the evaluation unit can also be arranged separately from the coil arrangement 112 on a further circuit carrier 114.
  • the rotating element has at least one axis of rotation 120.
  • the at least one encoder wheel 116 can be connected to the rotating element.
  • the encoder wheel 116 can also have an axis of rotation 120.
  • the rotating element and the encoder wheel 116 can have a common axis of rotation 120.
  • the rotating element and the encoder wheel 116 can rotate about the common axis of rotation 120.
  • the encoder wheel 116 can sweep over the coil arrangement 112 of the inductive position sensor 122 attached, for example, concentrically around the encoder wheel 116 and / or around the circular segment of the encoder wheel 116 during rotation.
  • An excitation voltage can be applied to the excitation coil 124.
  • the excitation coil 124 can, for example, have a voltage of 0.5 to 10 V, preferably a voltage of 1.5 V, and a frequency of 1 MHz to 10 MHz, particularly preferably 5 MHz.
  • the at least one receiver coil 126 can have at least two oppositely oriented partial turns 142. The one induced in the receiver coil 126 The voltage can also be zero when the excitation coil 124 is energized, for example in the absence of the encoder wheel 116.
  • the encoder wheel profile 118 can change the inductive coupling between the excitation coil 124 and the receiver coil 126 when it passes over the coil arrangement 112.
  • the inductive position sensor 122 for example a voltage signal, corresponding to the inductive coupling and / or the change in the inductive coupling, which is caused by the position of the encoder wheel 116 and / or the movement of the Encoder wheel 116 can be effected.
  • the method can include the determination of the angular position of the encoder wheel 116.
  • the angular position of the encoder wheel 116 can correspond to an angular position of the rotating element.
  • the sensor system 110 can be set up to enable the angular position of the rotating element to be available when a voltage supply is switched on (“true power on” function).
  • the encoder wheel 116 can sweep over the magnetic sensor element 132 of the phase encoder 128 during the rotation.
  • the encoder wheel profile 118 can influence the magnetic field generated by the magnetic field generator 130.
  • the phase encoder signal in particular the voltage signal of the magnetic sensor element 132, is also recorded in this exemplary embodiment, corresponding to the magnetic field caused by the position of the encoder wheel 116.
  • the method can include a determination of the angular position of the encoder wheel and / or a determination of the speed of the rotating element with the aid of the at least one phase encoder signal.
  • the method can include the processing of the at least one recorded phase encoder signal by an evaluation circuit (not shown here).
  • the method can include the forwarding of the at least one recorded phase encoder signal to a control device, which is likewise not shown in the figures.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Claims (13)

  1. Système de capteur (110) permettant de déterminer au moins une propriété de rotation d'un élément en rotation autour d'au moins un axe de rotation, dans lequel le système de capteur (110) présente au moins une roue de capteur (116) pouvant être reliée à l'élément en rotation, la roue de capteur (116) présentant un profil de roue de capteur (118), dans lequel le système de capteur (110) présente au moins un capteur de position inductif (122), le capteur de position inductif (122) présentant au moins un agencement de bobines (112) comprenant au moins une bobine d'excitation (124) et au moins une bobine de réception (126),
    caractérisé en ce que le système de capteur (110) présente en outre au moins un capteur de phase (128), dans lequel le capteur de phase (128) présente au moins un générateur de champ magnétique (130) et au moins un élément de capteur magnétique (132) et l'élément de capteur magnétique (132) présente au moins un élément sélectionné dans le groupe composé d'un élément à effet Hall et d'un élément magnétorésistif.
  2. Système de capteur (110) selon la revendication 1, dans lequel l'agencement de bobines (112) est disposé sur au moins un support de circuit (114), le support de circuit (114) étant agencé coaxialement à l'axe de rotation (120), le support de circuit (114) entourant la roue de capteur (116) ou un segment de cercle de la roue de capteur (116) de manière substantiellement circulaire.
  3. Système de capteur (110) selon la revendication précédente, dans lequel le support de circuit (114) entoure la roue de capteur (116) ou un segment de cercle de la roue de capteur (116) de manière substantiellement circulaire, l'agencement de bobines (112) recouvrant dans au moins une position angulaire au moins élément profilé (134) et au moins un espace intermédiaire (136) entre deux éléments profilés (134) de la roue de capteur (116).
  4. Système de capteur (110) selon l'une quelconque des revendications précédentes, dans lequel le système de capteur (110) est aménagé pour détecter un couplage inductif et/ou une modification d'un couplage inductif entre la bobine d'excitation (124) et la bobine de réception (126), le système de capteur (110) étant en outre aménagé pour détecter un signal de mesure électrique du capteur de phase (128).
  5. Système de capteur (110) selon la revendication précédente, dans lequel le système de capteur (110) est aménagé pour détecter le couplage inductif et/ou une modification du couplage inductif entre la bobine d'excitation (124) et la bobine de réception (126) provoqué(e) par un mouvement et/ou par une position de la roue de capteur (116), le système de capteur (110) étant en outre aménagé pour détecter un signal de mesure électrique du capteur de phase (128), provoqué par la position de la roue de capteur (116).
  6. Système de capteur (110) selon la revendication précédente, dans lequel le système de capteur (110) est aménagé pour déterminer à partir du couplage inductif et/ou d'une modification du couplage inductif entre la bobine d'excitation (124) et la bobine de réception (126), provoqué(e) par le mouvement et/ou par la position de la roue de capteur (116), une position angulaire de l'élément en rotation, le système de capteur (110) étant en outre aménagé pour déterminer à l'aide d'au moins un signal de mesure électrique du capteur de phase (132), provoqué par la position de la roue de capteur (116), la position angulaire et/ou une vitesse de rotation de l'élément en rotation.
  7. Système de capteur (110) selon la revendication précédente, dans lequel le système de capteur (110) est aménagé pour permettre une disponibilité de la position angulaire absolue de l'élément en rotation lors de la mise en marche d'une alimentation en courant comme une fonction de mise sous tension réelle (« True Power On »).
  8. Système de capteur (110) selon l'une quelconque des revendications précédentes, dans lequel ladite au moins une bobine de réception (126) est composée d'au moins deux enroulements partiels (142), les enroulements partiels (142) successifs étant orientés en sens opposé.
  9. Système de capteur (110) selon l'une quelconque des revendications précédentes, dans lequel le profil de roue de capteur (118) présente au moins un élément profilé (134).
  10. Système de capteur (110) selon l'une quelconque des revendications précédentes, dans lequel le système de capteur (110) présente au moins deux roues de capteur (116).
  11. Elément de capteur (110) selon la revendication précédente, dans lequel les deux roues de capteur (116) présentent des profils de roue de capteur (118) différents.
  12. Procédé permettant de déterminer au moins une propriété de rotation d'un élément en rotation autour d'un axe de rotation (120), le procédé comprenant l'utilisation d'au moins une roue de capteur (116) pouvant être reliée à l'élément en rotation, la roue de capteur (116) présentant un profil de roue de capteur (118), le procédé comprenant en outre les étapes suivantes consistant à :
    - enregistrer au moins un signal inductif au moyen d'au moins un capteur de position inductif (122), le capteur de position inductif (122) présentant au moins un agencement de bobines (112) comprenant au moins une bobine d'excitation (124) et au moins une bobine de réception (126) ; et
    - enregistrer au moins un signal de capteur de phase au moyen d'au moins un capteur de phase (128), le capteur de phase (128) présentant au moins un générateur de champ magnétique (130) et au moins un élément de capteur magnétique (132), et l'élément de capteur magnétique (132) présentant au moins un élément sélectionné dans le groupe composé d'un élément à effet Hall et d'un élément magnétorésistif.
  13. Procédé selon la revendication précédente, dans lequel le procédé comprend une détermination de la position angulaire de l'élément en rotation à l'aide du couplage inductif et/ou d'une modification du couplage inductif dans l'agencement de bobines (112), détecté(e), dépendant d'une position et/ou d'un mouvement de la roue de capteur (116), le procédé comprenant en outre une détermination de la position angulaire et/ou d'une vitesse de rotation de l'élément en rotation à l'aide d'au moins un signal de capteur de phase provoqué par la position de la roue de capteur (116).
EP17787413.8A 2016-12-13 2017-10-23 Système de capteur pour déterminer au moins une propriété de rotation d'au moins un élément rotatif tournant autour d'au moins un axe de rotation Active EP3555571B1 (fr)

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DE102016224856.1A DE102016224856A1 (de) 2016-12-13 2016-12-13 Sensorsystem zur Bestimmung mindestens einer Rotationseigenschaft eines um mindestens eine Rotationsachse rotierenden Elements
PCT/EP2017/076977 WO2018108365A1 (fr) 2016-12-13 2017-10-23 Système de capteur pour déterminer au moins une propriété de rotation d'au moins un élément rotatif tournant autour d'au moins un axe de rotation

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US20200103250A1 (en) 2020-04-02

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